The UITP World Congress & Exhibition is the largest worldwide public transport event that is held every second year in different cities around the world. It involves wide range of participants from public transport authorities and politicians at the local, national and cross-national levels to the manufacturing companies, suppliers, operators, investors and solution providers to all segments of the public transport sector and its related mobility infrastructure. It includes rail, road, water-born and even alternative and new modes of public transport systems for short distance and urban mobility covering metropolitan areas and other specific territories. This report summarizes background information on the UITP organization, its impact and related public transport projects as well as field notes and empirical insights collected from the research visit to UITP world congress and exhibition in Milan between 8to 10th of June 2015. The focus of the research visit and the scope of this report mainly concern city-bus vehicles and related EU-funded projects or public-private partnerships for technological advancements of the alternative powertrain in this field i.e. hybridization and electrification of city buses.